/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench/ps2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:31:27,475 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:31:27,478 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:31:27,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:31:27,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:31:27,526 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:31:27,529 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:31:27,532 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:31:27,534 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:31:27,538 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:31:27,539 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:31:27,540 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:31:27,540 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:31:27,543 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:31:27,545 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:31:27,547 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:31:27,548 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:31:27,549 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:31:27,551 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:31:27,560 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:31:27,562 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:31:27,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:31:27,564 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:31:27,565 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:31:27,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:31:27,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:31:27,584 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:31:27,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:31:27,585 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 21:31:27,608 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:31:27,608 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:31:27,609 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:31:27,609 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:31:27,609 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:31:27,610 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:31:27,610 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:31:27,610 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:31:27,610 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:31:27,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:31:27,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:31:27,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:31:27,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:31:27,611 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:31:27,611 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:31:27,612 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:31:27,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:31:27,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:31:27,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:31:27,612 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:31:27,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:31:27,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:31:27,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:31:27,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:31:27,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:31:27,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:31:27,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:31:27,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:31:27,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:31:27,614 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:31:27,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:31:27,914 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:31:27,918 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:31:27,920 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:31:27,922 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:31:27,922 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/ps2.c [2020-08-21 21:31:27,978 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a84a2c15/4514393f89984025875fc784268fd5dc/FLAG1c4f3f1a2 [2020-08-21 21:31:28,401 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:31:28,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/nla-digbench/ps2.c [2020-08-21 21:31:28,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a84a2c15/4514393f89984025875fc784268fd5dc/FLAG1c4f3f1a2 [2020-08-21 21:31:28,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2a84a2c15/4514393f89984025875fc784268fd5dc [2020-08-21 21:31:28,831 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:31:28,833 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:31:28,834 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:31:28,834 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:31:28,838 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:31:28,839 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:31:28" (1/1) ... [2020-08-21 21:31:28,842 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50be01d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:28, skipping insertion in model container [2020-08-21 21:31:28,842 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:31:28" (1/1) ... [2020-08-21 21:31:28,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:31:28,867 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:31:29,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:31:29,028 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:31:29,042 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:31:29,054 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:31:29,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29 WrapperNode [2020-08-21 21:31:29,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:31:29,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:31:29,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:31:29,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:31:29,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,156 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,157 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,161 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,166 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... [2020-08-21 21:31:29,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:31:29,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:31:29,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:31:29,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:31:29,170 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:31:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:31:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:31:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 21:31:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 21:31:29,235 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:31:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:31:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:31:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 21:31:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 21:31:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 21:31:29,236 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:31:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:31:29,237 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:31:29,422 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:31:29,423 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 21:31:29,427 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:31:29 BoogieIcfgContainer [2020-08-21 21:31:29,427 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:31:29,428 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:31:29,428 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:31:29,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:31:29,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:31:28" (1/3) ... [2020-08-21 21:31:29,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8886c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:31:29, skipping insertion in model container [2020-08-21 21:31:29,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:31:29" (2/3) ... [2020-08-21 21:31:29,434 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e8886c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:31:29, skipping insertion in model container [2020-08-21 21:31:29,434 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:31:29" (3/3) ... [2020-08-21 21:31:29,436 INFO L109 eAbstractionObserver]: Analyzing ICFG ps2.c [2020-08-21 21:31:29,448 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:31:29,455 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:31:29,471 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:31:29,504 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:31:29,506 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:31:29,506 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:31:29,506 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:31:29,506 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:31:29,506 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:31:29,507 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:31:29,507 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:31:29,526 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-08-21 21:31:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 21:31:29,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:29,533 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:29,534 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:29,539 INFO L82 PathProgramCache]: Analyzing trace with hash -64610451, now seen corresponding path program 1 times [2020-08-21 21:31:29,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:29,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892635164] [2020-08-21 21:31:29,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:29,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:31:29,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:31:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 21:31:29,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892635164] [2020-08-21 21:31:29,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:31:29,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 21:31:29,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977023354] [2020-08-21 21:31:29,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 21:31:29,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:31:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 21:31:29,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 21:31:29,695 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-08-21 21:31:29,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:31:29,721 INFO L93 Difference]: Finished difference Result 35 states and 45 transitions. [2020-08-21 21:31:29,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 21:31:29,723 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 21:31:29,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:31:29,733 INFO L225 Difference]: With dead ends: 35 [2020-08-21 21:31:29,734 INFO L226 Difference]: Without dead ends: 15 [2020-08-21 21:31:29,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 21:31:29,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-21 21:31:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-21 21:31:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-21 21:31:29,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-08-21 21:31:29,778 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-08-21 21:31:29,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:31:29,779 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-08-21 21:31:29,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 21:31:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-08-21 21:31:29,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 21:31:29,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:31:29,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:31:29,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:31:29,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:31:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:31:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash -62822991, now seen corresponding path program 1 times [2020-08-21 21:31:29,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:31:29,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063622580] [2020-08-21 21:31:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:31:29,790 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-08-21 21:31:29,791 WARN L168 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2020-08-21 21:31:29,791 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 21:31:29,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:31:29,810 WARN L231 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-08-21 21:31:29,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:31:29 BoogieIcfgContainer [2020-08-21 21:31:29,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:31:29,814 INFO L168 Benchmark]: Toolchain (without parser) took 979.70 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 102.0 MB in the beginning and 146.7 MB in the end (delta: -44.7 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:29,815 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 21:31:29,816 INFO L168 Benchmark]: CACSL2BoogieTranslator took 220.90 ms. Allocated memory is still 143.1 MB. Free memory was 101.6 MB in the beginning and 92.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:29,817 INFO L168 Benchmark]: Boogie Preprocessor took 113.20 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 92.2 MB in the beginning and 180.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:29,818 INFO L168 Benchmark]: RCFGBuilder took 258.44 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 167.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:29,819 INFO L168 Benchmark]: TraceAbstraction took 382.18 ms. Allocated memory is still 201.9 MB. Free memory was 167.5 MB in the beginning and 146.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. [2020-08-21 21:31:29,825 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 143.1 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 220.90 ms. Allocated memory is still 143.1 MB. Free memory was 101.6 MB in the beginning and 92.2 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.20 ms. Allocated memory was 143.1 MB in the beginning and 201.9 MB in the end (delta: 58.7 MB). Free memory was 92.2 MB in the beginning and 180.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 258.44 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 167.5 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 382.18 ms. Allocated memory is still 201.9 MB. Free memory was 167.5 MB in the beginning and 146.7 MB in the end (delta: 20.7 MB). Peak memory consumption was 20.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 10]: Unable to prove that call of __VERIFIER_error() unreachable Unable to prove that call of __VERIFIER_error() unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L16] int k, y, x, c; [L17] k = __VERIFIER_nondet_int() [L19] y = 0 [L20] x = 0 [L21] c = 0 [L23] COND TRUE 1 [L24] CALL __VERIFIER_assert((y * y) - 2 * x + y == 0) [L8] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 0.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 81 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...